1 /* SPDX-License-Identifier: GPL-2.0 */
3 * sha3-ce-glue.c - core SHA-3 transform using v8.2 Crypto Extensions
5 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <asm/hwcap.h>
15 #include <asm/unaligned.h>
16 #include <crypto/internal/hash.h>
17 #include <crypto/internal/simd.h>
18 #include <crypto/sha3.h>
19 #include <linux/cpufeature.h>
20 #include <linux/crypto.h>
21 #include <linux/module.h>
23 MODULE_DESCRIPTION("SHA3 secure hash using ARMv8 Crypto Extensions");
24 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
25 MODULE_LICENSE("GPL v2");
27 asmlinkage void sha3_ce_transform(u64 *st, const u8 *data, int blocks,
30 static int sha3_update(struct shash_desc *desc, const u8 *data,
33 struct sha3_state *sctx = shash_desc_ctx(desc);
34 unsigned int digest_size = crypto_shash_digestsize(desc->tfm);
36 if (!crypto_simd_usable())
37 return crypto_sha3_update(desc, data, len);
39 if ((sctx->partial + len) >= sctx->rsiz) {
43 int p = sctx->rsiz - sctx->partial;
45 memcpy(sctx->buf + sctx->partial, data, p);
47 sha3_ce_transform(sctx->st, sctx->buf, 1, digest_size);
55 blocks = len / sctx->rsiz;
60 sha3_ce_transform(sctx->st, data, blocks, digest_size);
62 data += blocks * sctx->rsiz;
67 memcpy(sctx->buf + sctx->partial, data, len);
73 static int sha3_final(struct shash_desc *desc, u8 *out)
75 struct sha3_state *sctx = shash_desc_ctx(desc);
76 unsigned int digest_size = crypto_shash_digestsize(desc->tfm);
77 __le64 *digest = (__le64 *)out;
80 if (!crypto_simd_usable())
81 return crypto_sha3_final(desc, out);
83 sctx->buf[sctx->partial++] = 0x06;
84 memset(sctx->buf + sctx->partial, 0, sctx->rsiz - sctx->partial);
85 sctx->buf[sctx->rsiz - 1] |= 0x80;
88 sha3_ce_transform(sctx->st, sctx->buf, 1, digest_size);
91 for (i = 0; i < digest_size / 8; i++)
92 put_unaligned_le64(sctx->st[i], digest++);
95 put_unaligned_le32(sctx->st[i], (__le32 *)digest);
97 *sctx = (struct sha3_state){};
101 static struct shash_alg algs[] = { {
102 .digestsize = SHA3_224_DIGEST_SIZE,
103 .init = crypto_sha3_init,
104 .update = sha3_update,
106 .descsize = sizeof(struct sha3_state),
107 .base.cra_name = "sha3-224",
108 .base.cra_driver_name = "sha3-224-ce",
109 .base.cra_blocksize = SHA3_224_BLOCK_SIZE,
110 .base.cra_module = THIS_MODULE,
111 .base.cra_priority = 200,
113 .digestsize = SHA3_256_DIGEST_SIZE,
114 .init = crypto_sha3_init,
115 .update = sha3_update,
117 .descsize = sizeof(struct sha3_state),
118 .base.cra_name = "sha3-256",
119 .base.cra_driver_name = "sha3-256-ce",
120 .base.cra_blocksize = SHA3_256_BLOCK_SIZE,
121 .base.cra_module = THIS_MODULE,
122 .base.cra_priority = 200,
124 .digestsize = SHA3_384_DIGEST_SIZE,
125 .init = crypto_sha3_init,
126 .update = sha3_update,
128 .descsize = sizeof(struct sha3_state),
129 .base.cra_name = "sha3-384",
130 .base.cra_driver_name = "sha3-384-ce",
131 .base.cra_blocksize = SHA3_384_BLOCK_SIZE,
132 .base.cra_module = THIS_MODULE,
133 .base.cra_priority = 200,
135 .digestsize = SHA3_512_DIGEST_SIZE,
136 .init = crypto_sha3_init,
137 .update = sha3_update,
139 .descsize = sizeof(struct sha3_state),
140 .base.cra_name = "sha3-512",
141 .base.cra_driver_name = "sha3-512-ce",
142 .base.cra_blocksize = SHA3_512_BLOCK_SIZE,
143 .base.cra_module = THIS_MODULE,
144 .base.cra_priority = 200,
147 static int __init sha3_neon_mod_init(void)
149 return crypto_register_shashes(algs, ARRAY_SIZE(algs));
152 static void __exit sha3_neon_mod_fini(void)
154 crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
157 module_cpu_feature_match(SHA3, sha3_neon_mod_init);
158 module_exit(sha3_neon_mod_fini);